changed comments
Merge branch 'feature/leftjoin' of https://github.com/ontop/ontop.git into feature/leftjoin
finished the unfolding of the query
I dont know
Merge branch 'feature/leftjoin' of https://github.com/ontop/ontop into
feature/leftjoin

Conflicts:
	quest-test/src/test/resources/logback-test.xml
	quest-test/src/test/resources/person.obda